How can I use Qt Creator 4.1 with Qt 5.8?

Hi; I can't write i and I letters in Qt Creator 4.2.1 on Ubuntu 16.04. So, I reported a bug information to Qt developers. So, I want to use Qt Creator 4.1 (default in Qt 5.7) with Qt 5.8. How can I do it? Qt 5.8 has Qt Creator 4.2.1 as default. Thanks!